Microsoft KB Archive/103971

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Project: Task Not Scheduled Prior to Project Start Date

PSS ID Number: Q103971 Article last modified on 03-15-1995

1.00 3.00 3.00a | 1.10 3.00


The information in this article applies to:
- Microsoft Project for Windows, versions 1.0, 3.0, 3.0a - Microsoft Project for Macintosh, versions 1.1, and 3.0


When a task has a predecessor relationship of finish-to-finish (FF) or start-to-finish (SF) and the scheduled start date is before the project start date, Microsoft Project will ignore the relationship and schedule the task on the start date of the project.

Regardless of the predecessor relationship, Microsoft Project will schedule the task to begin on the start date of the project.


A better way to set up the relationship is to assign task2 as the predecessor task, and task1 as the successor task with a finish-to-start (FS) relationship.

Alternatively, you can assign task1 a Start No Earlier Than (SNET) constraint and change the project start date (Options, Project Info) to reflect the date that you desire task2 to begin.


Steps to Reproduce Behavior

  1. Create two tasks, task1, and task2, and assign a two-day (2d) and three-day (3d) duration respectively.
  2. Make task1 a predecessor of task2 with a start-to-finish relationship.

Instead of ending at the start date of task1, task2 will begin on the same day as task1. This same behavior occurs when you use a finish-to-finish (FF) relationship.

KBCategory: kbusage KBSubcategory:

Additional reference words: 3.00 3.00a 1.10 1.00 calculation

Copyright Microsoft Corporation 1995.